CN104904033A - Battery module having novel structure and battery pack comprising same - Google Patents

Battery module having novel structure and battery pack comprising same Download PDF

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Publication number
CN104904033A
CN104904033A CN201380069998.4A CN201380069998A CN104904033A CN 104904033 A CN104904033 A CN 104904033A CN 201380069998 A CN201380069998 A CN 201380069998A CN 104904033 A CN104904033 A CN 104904033A
Authority
CN
China
Prior art keywords
battery
module
busbar
electrode terminal
unit module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201380069998.4A
Other languages
Chinese (zh)
Other versions
CN104904033B (en
Inventor
李汎炫
成准烨
姜达模
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lg Energy Solution
Original Assignee
LG Chemical Co Ltd
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Filing date
Publication date
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Publication of CN104904033A publication Critical patent/CN104904033A/en
Application granted granted Critical
Publication of CN104904033B publication Critical patent/CN104904033B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/262—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with fastening means, e.g. locks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/296—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by terminals of battery packs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/507—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing comprising an arrangement of two or more busbars within a container structure, e.g. busbar modules
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/509—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the type of connection, e.g. mixed connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55—Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/564—Terminals characterised by their manufacturing process
    • H01M50/566—Terminals characterised by their manufacturing process by welding, soldering or brazing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/121—Organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Sustainable Energy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Connection Of Batteries Or Terminals (AREA)

Abstract

The present invention provides a battery module comprising: a unit module stacked body comprising at least two stacked unit modules, in which at least two battery cells are mounted onto a cell cover while mutually electrically connected, and an electrode terminal connection portion in the battery cells is perpendicularly bent and exposed outside of the cell cover; a module case in which the unit modules in the unit module stacked body are installed in an aligned manner so as to be serially connected to each other, wherein an electrode terminal part of the unit modules is open; and a busbar assembly installed at the electrode terminal part of the unit modules in the module case, wherein at least one busbar for serially connecting the unit modules is installed while exposed so that welding from the outside can take place; and an electrically insulating cover for covering the busbar assembly.

Description

There is the battery module of novel structure and comprise the battery pack of this battery module
Technical field
The present invention relates to and a kind ofly present the battery module of high structural stability and a kind of battery pack comprising this battery module, and more specifically relate to so a kind of battery module, this battery module comprises: unit module stacked body, this unit module stacked body is configured to have following structure, in the structure shown here, two or more unit module is stacked, each unit module is arranged on two or more battery cell at monomer lid place under being included in the state that battery cell is electrically connected to each other, and under the state that the electrode terminal connections of unit module vertically bends at electrode terminal connections from monomer lid outwardly, module housing, the unit module of unit module stacked body is disposed in this module housing, the connection thus unit module is one another in series, and the electrode terminal of unit module is unlimited, be arranged on the busbar assembly at the electrode terminal place of the unit module in module housing, this busbar assembly comprises one or more busbar for being connected in series between unit module, and busbar is mounted thus performs welding from outside under exposed state, with the electric insulation lid for covering busbar assembly.
Background technology
In recent years, the energy of portable radio device can be widely used as by the secondary cell of charging and discharging.In addition, as the energy for motor vehicle (EV) and hybrid electric vehicle (HEV), secondary cell has attracted considerable concern, and described vehicle has been developed to solve the problem such as air pollution caused by the existing gasoline and diesel vehicle that use fossil fuel.
Small-sized mobile devices uses one or several battery cells for each device.On the other hand, to export because high and Large Copacity is necessary for medium-sized or large-scale plant, so medium-sized or large-scale plant such as vehicle use comprises the medium-sized or large-sized battery module of the multiple battery cells be electrically connected to each other.
Preferably, medium-sized or large-sized battery module is manufactured with size little as far as possible and weight.Therefore, it is possible to by stacking with high integration and there is the prismatic batteries of little gravimetric ratio or bag shape battery is often used as battery cell that is medium-sized or large-sized battery module.Especially, a lot of interest concentrates at present and uses aluminum laminate sheet as on the bag shape battery of shield part, because the weight of bag shape battery is little, and the low cost of manufacture of bag shape battery.
But the mechanical strength of shield part is low.Therefore, battery cell (element cell) is arranged in battery-pack exterior casing such as battery case, thus manufactures the battery module with rock-steady structure.But device or vehicle have limited installing space for installing medium-sized or large-sized battery module wherein.Therefore, in the situation size of battery module being increased in the use due to battery-pack exterior casing such as battery case, space availability ratio reduces.In addition, due to the low mechanical strength of battery cell, during the charging and discharging of battery cell, battery cell expands repeatedly and shrinks.As a result, the thermal weld region of battery cell can be easily separated from one another.
Therefore, in order to overcome the above problems, the korean patent application No.2006-45444 submitted to the name of the applicant of present patent application discloses a kind of battery module comprising plate shape battery cell, each plate shape battery cell has the electrode terminal formed with lower end at its upper end, wherein this battery module comprises: two or more battery cell, the electrode terminal of battery cell is one another in series connection, and the connecting portion between electrode terminal is bent thus battery cell is stacked; With a pair high strength monomer lid, it is connected to each other with the whole outer surface of clad battery monomer stacked body.
In the foregoing disclosure, at the assembly process of battery module, two bag shape battery cells are by arranged in series in a longitudinal direction, thus the electrode terminal of battery cell is adjacent one another are continuously, and then the electrode terminal of battery cell is coupled to each other by ultrasonic bonding.Subsequently, folded thus the battery cell of these two battery cells that its electrode terminal is coupled to each other is in the face of each other to form battery cell stacked body, this battery cell stacked body is arranged on manufacturing cell's battery module in monomer lid, and the electrode terminal between element cell module is connected to each other to manufacture medium-sized or large-sized battery module.
But, as previously described, during being the connection of the electrode terminal between element cell module or the connection of electrode terminal and electrode tabs, before battery module is arranged in battery pack outer cover, pass through ultrasonic bonding, electrode terminal and electrode tabs are soldered to each other, and after connecting electrode terminal, battery module is installed in battery pack outer cover.Therefore, assembling process is complicated, and in addition, the impact produced during assembling process can be delivered to electrode terminal, the possibility of result generation internal short-circuit.
In addition, the positive electrode terminal of battery module and negative electrode terminal are made from a variety of materials.Therefore, when positive electrode terminal and negative electrode terminal are welded to each other, weld connection power is weak.And then when the medium-sized or large-sized battery module being applied to and manufacturing as mentioned above is such as vibrated and impacted to external force, the welding region of battery module can be separated from one another, and the possibility of result is short-circuited.
Therefore, following technology is highly necessary, and this technology easily can be assembled medium-sized or large-sized battery pack and be improved soldering reliability while overcoming the above problems, and substantially guarantees the fail safe of battery pack thus.
Summary of the invention
Technical problem
Therefore, the present invention has realized for overcoming the above problems Buddhist monk's other technical problem to be solved.
Particularly, one object of the present invention is to provide a kind of battery module and a kind of battery pack comprising this battery module, this battery module configurations is for having following structure, the battery cell be wherein connected in parallel with each other is used a kind of special busbar assembly to be one another in series connecting single batteries to provide large capacity with a kind of special structural configuration, this battery module is made to be compact, stable, and be easy to assemble, and various battery cells can be used as required during the manufacture of battery module.
Technical scheme
According to an aspect of the present invention, above and other object can be realized by providing a kind of battery module, this battery module comprises: unit module stacked body, this unit module stacked body is configured to have following structure, in the structure shown here, two or more unit module is stacked, each unit module is arranged on two or more battery cell at monomer lid place under being included in the state that battery cell is electrically connected to each other, and the electrode terminal connections of the state lower unit module vertically bent at electrode terminal connections from monomer lid outwardly; Module housing, the unit module of unit module stacked body is arranged in this module housing, unit module is one another in series connection, and the electrode terminal of unit module is unlimited; Busbar assembly, this busbar assembly is installed in the electrode terminal place of the unit module in module housing, this busbar assembly comprises one or more busbar for being connected in series between unit module, and busbar is mounted under exposed state to be made to perform welding from outside; With the electric insulation lid for covering busbar assembly.
Therefore, can so construct according to battery module of the present invention and the battery pack that comprises this battery module, make based on special construction as above, battery module and battery pack are compact, stable, and be easy to assemble.In addition, battery module and comprise this battery module the manufacture of battery pack during, various battery cells can be used as required.
In addition, battery cell can be connected in parallel with each other.Because achieve the welding between the parts be manufactured from the same material, soldering reliability is improved.
Each battery cell can be plate shape battery cell, and this plate shape battery cell provides high stacking rate in a limited space.Such as, each battery cell can be configured to have wherein electrode assemblie and be arranged on structure in the battery case be made up of laminated sheet.
Especially, each battery cell can be pouch-typed secondary battery, and the electrode assemblie that this pouch-typed secondary battery is configured to have wherein positive electrode/separator/negative electrode structure is received in the structure in battery case in sealed states together with electrolyte.Such as, each battery cell can be plate shape secondary cell, and this plate shape secondary cell is configured to have approximate rectangular hexahedron structure, and this structure has little thickness and width ratio.Usually, pouch-typed secondary battery comprises a bag shape battery case.Battery case can be configured to have laminate structure, in this laminate structure, the external skin formed by the polymer resin presenting high-durability, by stopping the barrier layer that the metal material of moisture or air is formed, with by can the inner sealing oxidant layer that formed of the polymer resin of thermal be sequentially stacked.
In a preferred embodiment, be connected in parallel with each other under the state that the battery cell of unit module directly can be connected to each other at electrode terminal, and electrode terminal connections vertically can bend and make electrode terminal connections have face of weld, and the busbar of busbar assembly is formed with this face of weld and contacts.
Each battery cell can be configured to have following structure, in the structure shown here, positive electrode terminal and negative electrode terminal is formed at one end place of each battery cell, and be stacked under the state that unit module alternately can be arranged at unit module, make positive electrode terminal and negative electrode terminal between the neighboring unit module in unit module adjacent one another are.
More than alternately layout is very preferred, because there is no need to use long link for being connected in series between unit module.
Various module housing can be set.Such as, can be configured to have can the frame structure of outer surface of capping unit module stacked body for module housing.
In above structure, module housing can be provided with one or more connection part in its outer surface, and this connection part is used for battery module to be installed to device or battery-pack exterior casing.
Under the state that connection part is outstanding from the outer surface of module housing, connection part can extend along the outer surface of module housing by the vertical direction, and each connection part can be provided with the groove of depression, this groove extends along the vertical central axial line of each connection part.Shape and the number of groove are not particularly limited.
In a preferred embodiment, busbar assembly can comprise the electrical insulating property rectangular module body being arranged on module housing place, and is arranged on one or more busbar at rectangular module body place under the state of opening wide in front surface and the rear surface of each busbar.
In an instantiation, busbar assembly can comprise multiple busbar, and each busbar can be the metal plate component with the end opposite being connected to component body.Each busbar can be provided with the detection terminal for voltage detecting at its one end place.
In above structure, the busbar of the outside input and output terminal of the formation in busbar can comprise outside input and output terminal portion, and each outside input and output terminal portion has the one end being connected to component body in an extended condition.
Outside input and output terminal portion such as can be coupled to component body by bolt.But, the present invention is not limited thereto.
According to circumstances, bolt via component body, such as, can also be connected to module housing via the through hole formed at component body place.
Meanwhile, the electrical connection between electrode terminal connections and busbar can be realized by the welding performed on the outer surface of busbar.
Welding can be performed by laser is applied to the outer surface of busbar.
Busbar assembly can use various method to be arranged on module housing place.Such as, busbar assembly can be provided with secure component, and this secure component is given prominence to from the end opposite of busbar assembly, and module housing can be provided with the fastening groove corresponding to secure component.
In an identical manner, lid can use various method to be arranged on busbar assembly place.Such as, lid can be provided with secure component, and this secure component is given prominence to from the end opposite of lid, and busbar assembly can be provided with the fastening groove corresponding to secure component.
According to other aspects of the invention, provide a kind of battery pack, this battery pack comprises two or more battery module be arranged in battery-pack exterior casing, and provides a kind of and comprise this battery module or the battery pack device as power supply.
Wherein can use and can comprise motor vehicle, hybrid electric vehicle, plug-in hybrid electric vehicle or electric power storing device according to the preferred embodiment of the device of battery pack of the present invention, it has limited installing space and is exposed to vibration and thump frequently.
Certainly, based on the output expected and capacity, can combine and manufacture the battery pack of power supply as vehicle.
Battery pack is used to be well-known in the technical field of the invention as the motor vehicle of power supply, hybrid electric vehicle and plug-in hybrid electric vehicle, and therefore will description is omitted.
Accompanying drawing explanation
Combine with accompanying drawing, according to following detailed description, clearly will understand above and other object of the present invention, other advantage of characteristic sum, wherein:
Fig. 1 is the decomposition diagram that battery module is according to an embodiment of the invention shown;
Fig. 2 is the perspective view that battery module is according to an embodiment of the invention shown;
Fig. 3 is the perspective view that battery pack is shown, is provided with according to battery module of the present invention in this battery pack;
Fig. 4 is the perspective view that the battery cell be arranged in unit module is shown;
Fig. 5 is the decomposition exemplary view of the battery cell that Fig. 4 is shown;
Fig. 6 is the perspective view that unit module is shown, is provided with according to two battery cells of the present invention in this battery module;
Fig. 7 is the perspective view that unit module stacked body is shown, wherein stacking with good grounds two unit modules of the present invention;
Fig. 8 illustrates the plan view according to battery module of the present invention; And
Fig. 9 is the zoomed-in view of the part " A " that Fig. 7 is shown.
Embodiment
Now, exemplary embodiment of the present invention is described in detail with reference to accompanying drawing.But, it is noted that scope of the present invention is not limited by illustrated embodiment.
Fig. 1 is the decomposition diagram that battery module according to an embodiment of the invention is typically shown, Fig. 2 is the perspective view that battery module according to an embodiment of the invention is typically shown, and Fig. 3 is the perspective view that battery pack is typically shown, is wherein provided with according to battery module of the present invention.
With reference to these figure, battery pack 200 comprises battery module 300, base plate 110, front surface support component 120, rear surface support component 130, side surface support component 140 and multiple tape member 150.
Battery module 300 is loaded on the top surface of base plate 110, and front surface support component 120 and rear surface support component 130 are arranged on front surface and the rear surface place of battery module 300 respectively.
Side surface support component 140 is connected to base plate 110, side surface support component 140 is covered form the outer surface of battery pack 200, the side surface of battery module 300, and the partly front surface of clad battery group 200 and rear surface.
Tape member 150 is connected to base plate 110 to locate and self-contained battery module 300 while the top surface and contrary two side surfaces of clad battery module 300.
The position that base plate 110 corresponds to tape member 150 at it arranges through hole 115, and the trip bolt 205 for self-contained battery module 300 is inserted through this through hole 115.
Each battery module 300 comprises unit module stacked body 600, module housing 360, busbar assembly 350 and electric insulation lid 310.
Each battery module 300 is constructed to have following structure, and wherein unit module 500 (with reference to appended Fig. 6) is stacking along vertical direction, and each unit module 500 comprises multiple battery cell 10.Each unit module 500 is configured to have following structure, and the outer surface of the multiple battery cells 10 be wherein electrically connected to each other is covered (with reference to appended Fig. 6) by monomer lid 510.Battery cell 10 is made not to be exposed to outside, so battery cell is illustrated by dotted line in the drawings because battery cell 10 is covered by monomer lid 510.
Will hereafter be described in more detail the structure of battery cell 10.
Specifically, the unit module stacked body 600 forming each battery module 300 is constructed to have following structure, wherein unit module 500 is sequentially stacked, each unit module 500 comprises two or more battery cell 10, described battery cell 10 is arranged on monomer lid 510 place under the state be connected in parallel with each other, under the state that electrode terminal vertically bends, the electrode terminal (not shown) of battery cell 10 from monomer lid 510 outwardly.
Module housing 360 is constructed to have the frame structure of opening wide at its top surface and front surface place, make it possible to easily installation unit module stacked body 600, and installation unit module 500 under the state can given prominence at the electrode terminal (not shown) of unit module 500.
In addition, module housing 360 is provided with bolt insertion section 365 and fastening groove 362, and busbar assembly 350 is connected to module housing 360 by bolt insertion section 365 and fastening groove 362.And then module housing 360 is provided with two connection parts 363 at the outside place of its every side, and module housing 360 is installed to base plate 110 by connection part 363.
Especially, under the state that connection part 363 is outstanding from the outer surface of module housing 360, connection part 363 in the vertical direction extends along the outer surface of module housing 360.Each connection part 363 is provided with the groove 361 of depression, and described groove 361 extends along the vertical central axial line of each connection part 363.Insert the state among corresponding in recessed trench 361 in each tape member 150 under, tape member 150 is arranged on base plate place.Formed for supporting the multiple ribs 366 of corresponding in connection part 363 at each recessed trench 361 side place.
Busbar assembly 350 comprises busbar 351, and described busbar 351 is arranged on a surface of module housing 360 with the connection that is one another in series by the electrode terminal of unit module 500.
Each busbar 351 is provided with the detection terminal 352 for voltage detecting at its one end place, and it extends in a longitudinal direction.The busbar forming outside input and output terminal in busbar 351 comprises outside input and output terminal portion 353, and each outside input and output terminal portion has the one end at the component body place being arranged on busbar assembly 350 while extending in a longitudinal direction.
In addition, busbar assembly 350 is provided with the fastening groove 355 for connecting with electric insulation lid 310 and the secure component 354 for connecting with module housing 360.
When busbar assembly 350 is arranged on the front surface place of module housing 360, busbar 351 is formed with the electrode terminal of unit module 500 and contacts.Therefore, laser can be applied to busbar 351 above from busbar assembly 350, result busbar 351 can easily be welded.
Electric insulation lid 310 covers the busbar 351 of busbar assembly 350.
Lid 310 is made up to make to insulate between internal structure and outside of plastic material.Lid 310 is provided with the multiple secure components 311 for connecting with busbar assembly 350.
The secure component 311 formed at lid 310 place is inserted in the fastening groove of busbar assembly 350 place formation, and the secure component 354 formed at busbar assembly 350 place is inserted in the fastening groove 362 of module housing 360 place formation.As a result, the module housing 360 of battery module 300, busbar assembly 350 and lid 310 are by easily secured to one another.
In addition, in the bolt insertion section 365 of outside input and output terminal portion 353 insert module shell 360.As a result, the connection between the component of battery module 300 is completed.
Fig. 4 is the perspective view that the exemplary battery monomer be arranged in unit module of the present invention is typically shown, and Fig. 5 is the decomposition exemplary view of the battery cell that Fig. 4 is shown.
With reference to these figure, plate shape secondary cell 10 is constructed to have following structure, wherein, electrode assemblie is arranged in bag shape battery case 20 in sealed states, the separator that this electrode assemblie comprises positive electrode, negative electrode and is arranged in respectively between positive electrode and negative electrode, makes two electrode terminals 222 and 232 of the positive electricity polar curve sheet and negative electrode lug plate 220 and 230 being electrically connected to electrode assemblie outwards expose.
Battery case 20 comprises outer cover body 15 and is integrally connected to the lid 13 of outer cover body 15, and this outer cover body 15 has the receptacle 14 that electrode assemblie 210 is positioned at depression wherein.
There is the positive electrode lug plate 220 of the electrode assemblie 210 of stacked structure or stack/folding-typed structure and negative electrode lug plate 230 separately by weld connection to electrode terminal 222 and 232.In addition, insulating properties film 240 is attached to the top of each in electrode terminal 222 and 232 and bottom, when using thermosonic bonding apparatus thermally to be welded in the remaining portion 144 of outer cover body 15 and lid 13 with box lunch, prevent from being short-circuited between thermosonic bonding apparatus and electrode terminal 222 and 232 and guaranteeing the sealing between electrode terminal 222 and 232 and battery case 20.
Outer cover body 15 and each lid in 13 include external resin layer 16, isolating metal layer 17 and inner resin layer 18.Due to from the heat of thermosonic bonding apparatus (not shown) and pressure, the inner resin layer 18 of outer cover body 15 and the inner resin layer 18 of lid 13 are fixed to one another in intimate contact, the outer surface of this thermosonic bonding apparatus extruding outer cover body 15 and the outer surface of lid 13.
Under the state being arranged in receptacle 14 by the electrode assemblie 210 of electrolyte-impregnated, remaining portion 144 and the lid 13 of outer cover body 15 are thermally welded.As a result, hermetic unit is defined at battery case 20 place.
Fig. 6 is the perspective view that unit module is typically shown, be provided with according to two battery cells of the present invention in this unit module, Fig. 7 is the perspective view that unit module stacked body is typically shown, stacking with good grounds two unit modules of the present invention in this unit module stacked body, Fig. 8 illustrates the plan view according to battery module of the present invention, and Fig. 9 is the zoomed-in view of the part " A " that Fig. 7 is typically shown.
With reference to these figure, unit module 500 comprises two stacking battery cells 10 and the monomer lid 510 for the fully outer surface of clad battery monomer 10.
Battery module 300 comprises unit module stacked body 600, and multiple unit module 500 is stacked in this unit module stacked body 600.The electrode terminal 222 and 232 being arranged on the battery cell 10 in each unit module 500 is one another in series and is connected while being exposed to outside.
The electrode terminal 222 and 232 of unit module 500 is made the electrode terminal 222 and 232 of unit module 500 to be connected in parallel with each other by vertically bending.As a result, in vertical section so that " electrode terminal connections 550 that the shape of [" is formed is formed in unit module 500 place.The electrode terminal with identical polar is positioned on same vertical line, and the electrode terminal with identical polar can be connected in parallel with each other.
Electrode terminal connections 550 is vertically bent, and makes electrode terminal connections 550 have face of weld, and the busbar 351 of busbar assembly 350 is formed with this face of weld and contacts.By laser welding, the face of weld of electrode terminal connections 550 is electrically connected to each other with the outside being arranged to the busbar 351 contacted with the face of weld of electrode terminal connections 550.After electrode terminal connections 550 is fixed to module housing 360, performs laser welding, easily realizes the assembling of battery module thus.
Unit module 500 is connected to each other via busbar 351, is then electrically connected to outside input and output terminal portion 353.
Although disclose exemplary embodiment of the present invention to schematically be intended to, but it will be appreciated by those skilled in the art that, when not departing from as disclosed scope and spirit of the present invention in the following claims, various amendment, interpolation and to substitute be all possible.
Industrial applicibility
As illustrated clearly according to above, battery module according to the present invention is constructed to have following structure, the battery cell be wherein connected in parallel with each other by with a kind of special structural configuration and use a kind of special busbar assembly be one another in series connect described battery cell.Therefore, this battery module is compact, stable, and be easy to assemble.In addition, during the manufacture of battery module, various battery cell can be used as required.

Claims (22)

1. a battery module, comprising:
Unit module stacked body, described unit module stacked body is constructed to have following structure, in described structure, two or more unit module is stacked, unit module described in each comprises two or more battery cell, monomer lid place is arranged under the state that two or more battery cell described is electrically connected to each other at described battery cell, and under the state that vertically bends at described electrode terminal connections of the electrode terminal connections of described unit module from described monomer lid outwardly;
Module housing, the described unit module of described unit module stacked body is disposed in described module housing, described unit module is one another in series connection, and the electrode terminal of described unit module is unlimited;
Busbar assembly, described busbar assembly is arranged on the described electrode terminal place of the described unit module in described module housing, described busbar assembly comprises one or more busbar for being connected in series between described unit module, and described busbar is installed and made to perform welding from outside under exposed state; With
Electric insulation lid, described electric insulation lid is for covering described busbar assembly.
2. battery module according to claim 1, wherein, described battery cell is connected in parallel with each other.
3. battery module according to claim 1, wherein, battery cell described in each is plate shape battery cell.
4. battery module according to claim 3, wherein, battery cell described in each is constructed to have wherein electrode assemblie and is arranged on the structure in laminated sheet battery case.
5. battery module according to claim 1, wherein, be connected in parallel with each other under the state that the described battery cell of described unit module is directly coupled to each other at described electrode terminal, and described electrode terminal connections is vertically bending makes described electrode terminal connections have face of weld, and the described busbar of described busbar assembly contacts with described face of weld.
6. battery module according to claim 1, wherein, battery cell described in each is constructed to have following structure, in described structure, described in each, one end place of battery cell forms positive electrode terminal and negative electrode terminal, and be stacked under the state that described unit module is alternately arranged at described unit module, make between the neighboring unit module in described unit module, described positive electrode terminal and described negative electrode terminal adjacent one another are.
7. battery module according to claim 1, wherein, described module housing is constructed to the frame structure of the outer surface had for covering described unit module stacked body.
8. battery module according to claim 1, wherein, is provided with one or more connection part in the outer surface of described module housing, and described connection part is used for described battery module to be installed to device or battery-pack exterior casing.
9. battery module according to claim 8, wherein, under the state that described connection part is outstanding from the outer surface of described module housing, described connection part in the vertical direction extends along the outer surface of described module housing, and connection part described in each is provided with the groove of depression, described groove extends along the vertical central axial line of connection part described in each.
10. battery module according to claim 1, wherein, described busbar assembly comprises: the rectangular module body of electric insulation, and described rectangular module body is arranged on described module housing place; With one or more busbar, under the state that front surface and the rear surface of each busbar are opened wide, described busbar is arranged on described rectangular module body place.
11. battery modules according to claim 10, wherein, described busbar assembly comprises multiple busbar, and busbar described in each is the metal plate component with the opposite end being connected to described component body.
12. battery modules according to claim 11, wherein, described in each, one end place of busbar is provided with the detection terminal for voltage detecting.
13. battery modules according to claim 11, wherein, the busbar forming outside input and output terminal in described busbar comprises outside input and output terminal portion, and described in each, outside input and output terminal portion has the one end being connected to described component body in an extended condition.
14. battery modules according to claim 13, wherein, described outside input and output terminal portion is coupled to described component body by bolt.
15. battery modules according to claim 14, wherein, described bolt is also connected to described module housing.
16. battery modules according to claim 1, wherein, realize the electrical connection between described electrode terminal connections and described busbar by the welding performed on the outer surface of described busbar.
17. battery modules according to claim 16, wherein, perform described welding by laser is applied to the outer surface of described busbar.
18. battery modules according to claim 1, wherein, described busbar assembly is provided with secure component, and described secure component is given prominence to from the opposite end of described busbar assembly, and described module housing is provided with the fastening groove corresponding to described secure component.
19. battery modules according to claim 1, wherein, described lid is provided with secure component, and described secure component is given prominence to from the opposite end of described lid, and described busbar assembly is provided with the fastening groove corresponding to described secure component.
20. 1 kinds of battery pack, described battery pack comprises two or more individual battery module according to any one in claim 1 to 19, and described battery module is arranged in battery-pack exterior casing.
21. 1 kinds of devices, described device uses battery module according to claim 1 or battery pack according to claim 20 as power supply.
22. devices according to claim 21, wherein, described device is motor vehicle, hybrid electric vehicle, plug-in hybrid electric vehicle or electric power storing device.
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JP2016509747A (en) 2016-03-31
EP2988344B1 (en) 2017-10-11
JP6101823B2 (en) 2017-03-22
WO2014171559A1 (en) 2014-10-23
CN104904033B (en) 2018-03-09
EP2988344A1 (en) 2016-02-24
US9741984B2 (en) 2017-08-22
EP2988344A4 (en) 2016-04-06
US20160028056A1 (en) 2016-01-28

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